|
|
| |
| 双金属复合管凹陷演变机制及界面分离研究 |
| Evolution mechanism of dimpling and interface separation in bimetal clad pipes |
| 投稿时间：2024-06-10 修订日期：2024-08-06 |
| DOI： |
| 中文关键词: 双金属复合管 外部硬物 回弹率 凹陷 界面分离 |
| 英文关键词:bimetal clad pipe external mechanical loading rebound rates dimpling interface separation |
| 基金项目:国家自然科学基金项目（面上项目，重点项目，重大项目）, |
|
| 摘要点击次数: 17 |
| 全文下载次数: 0 |
| 中文摘要: |
| 为研究双金属复合管在外部硬物作用下的凹陷演变过程及界面分离机理，建立了压头作用下复合管受力模型，研究了内管和外管径厚比、成型压力、初始成型间隙和运行内压对复合管凹陷及界面分离的影响。结果表明：复合管界面分离距离和回弹率与内管径厚比、成型压力和初始成型间隙成正相关，与外管径厚比成负相关；运行内压越大，界面分离量越小，但回弹率越大；对凹陷管道内部进行充压可减小界面分离量，运行压力2MPa的复合管分离量比充压2MPa工况小5%，随后两种工况分离量差值随着压力增加而降低；相邻凹陷的发生会导致中间管段界面分离量增大，比单凹陷造成界面分离范围更广。 |
| 英文摘要: |
| To investigate the evolution of dimpling and the mechanism of interface separation in bimetal clad pipes under external mechanical loading, a stress model was established. The study analyzed the effects of the ratio of diameter to thickness for the inner and outer pipes, forming pressure, initial forming clearance, and operational internal pressure on dent formation and interface separation. Results indicate that interface separation distance and rebound rate correlate positively with the ratio of diameter to thickness for the inner pipes, forming pressure, and initial forming clearance, and negatively with the ratio of diameter to thickness for the outer pipes. Higher operational internal pressure reduces interface separation but increases rebound rate. Internal pressurization of dented pipes decreases interface separation; for instance, under 2 MPa operating pressure, interface separation is 5% less compared to conditions under 2 MPa pressurization. Additionally, the difference in separation between these conditions decreases with increasing pressure. Adjacent dimpling result in increased interface separation in intermediate pipe segments, causing a broader interface separation area compared to isolated dimpling. |
| 查看/发表评论 下载PDF阅读器 |
